DNA test and vitamins for newborn?

My wife has just given birth to a healthy baby boy, which we are incredibly grateful for!

We both have some mutations of various methylation genes, so I wanted to get the little guy tested and started on some supplements asap.

Am I being paranoid? Should I let nature take its course, as our parents did for us? I know we should start vitamin D supps asap, but should I start any other multivits? Can anyone recommend any brands?

Do not give babies adult doses - sorry if this is obvious.
Mutations of genes are common in many cases - that is - differing from the 'norm' - this does not mean they are bad or good.
Why do you think they are of clinical significance?